- variableThe name of the variable that this residual object operates on
C++ Type:NonlinearVariableName
Controllable:No
Description:The name of the variable that this residual object operates on
ODETimeDerivative
Returns the time derivative contribution to the residual for a scalar variable.
A scalar variable can be set to the solution of an ordinary differential equation (ODE), as specified in the Scalar Kernels syntax page. This kernel adds a time derivative term. The time integration scheme will be shared with the other non-linear variables. To use a different time integrating scheme, the ODETimeDerivative
scalar kernel should be replaced with a custom implementation.
Example input syntax
In this example, the scalar variables x
and y
are the solutions to the coupled ODE problem:
The time derivative terms are added for each variable using two ODETimeDerivative
scalar kernels.
[ScalarKernels]
[./td1]
type = ODETimeDerivative
variable = x
[../]
[./ode1]
type = ParsedODEKernel
expression = '-3*x - 2*y'
variable = x
coupled_variables = y
[../]
[./td2]
type = ODETimeDerivative
variable = y
[../]
[./ode2]
type = ParsedODEKernel
expression = '-4*x - y'
variable = y
coupled_variables = x
[../]
[]
(../moose/test/tests/kernels/ode/parsedode_sys_impl_test.i)Input Parameters
- absolute_value_vector_tagsThe tags for the vectors this residual object should fill with the absolute value of the residual contribution
C++ Type:std::vector<TagName>
Controllable:No
Description:The tags for the vectors this residual object should fill with the absolute value of the residual contribution
- extra_matrix_tagsThe extra tags for the matrices this Kernel should fill
C++ Type:std::vector<TagName>
Controllable:No
Description:The extra tags for the matrices this Kernel should fill
- extra_vector_tagsThe extra tags for the vectors this Kernel should fill
C++ Type:std::vector<TagName>
Controllable:No
Description:The extra tags for the vectors this Kernel should fill
- matrix_tagssystem timeThe tag for the matrices this Kernel should fill
Default:system time
C++ Type:MultiMooseEnum
Controllable:No
Description:The tag for the matrices this Kernel should fill
- vector_tagstimeThe tag for the vectors this Kernel should fill
Default:time
C++ Type:MultiMooseEnum
Controllable:No
Description:The tag for the vectors this Kernel should fill
Tagging Parameters
- control_tagsAdds user-defined labels for accessing object parameters via control logic.
C++ Type:std::vector<std::string>
Controllable:No
Description:Adds user-defined labels for accessing object parameters via control logic.
- enableTrueSet the enabled status of the MooseObject.
Default:True
C++ Type:bool
Controllable:Yes
Description:Set the enabled status of the MooseObject.
- implicitTrueDetermines whether this object is calculated using an implicit or explicit form
Default:True
C++ Type:bool
Controllable:No
Description:Determines whether this object is calculated using an implicit or explicit form
- seed0The seed for the master random number generator
Default:0
C++ Type:unsigned int
Controllable:No
Description:The seed for the master random number generator
- use_displaced_meshFalseWhether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.
Default:False
C++ Type:bool
Controllable:No
Description:Whether or not this object should use the displaced mesh for computation. Note that in the case this is true but no displacements are provided in the Mesh block the undisplaced mesh will still be used.